alternating thumb loop

<?php
/*
Template Name: Subpages Thumbnail Page
*/
?>

<?php get_header(); ?>

<div id="main-container-subpages">
   <div id="bottomclear">&nbsp;</div>

   <div class="subpages">
        <span style="display:none;"><?php the_ID(); ?></span>
        <?php $parent = $post->ID; ?>

        <?php
        query_posts( array('posts_per_page' => 8, 'post_type' => 'page', 'post_parent' => $parent,'meta_key' => '_thumbnail_id' ));

        while (have_posts()) : the_post(); ?>

               <?php $image_thumb = get_post_meta($post->ID, 'image-thumb', true); ?>

              <?php $width = (ceil($wp_query->current_post/2)%2) ? 'thin-detail' : 'wide-detail'; echo $width; ?>

            <div class="detailthumb-1"><a href="<?php the_permalink(); ?>"><?php the_post_thumbnail($width); ?></a></div>


       <?php endwhile; ?>

   </div>

   <div id="bottomclear">&nbsp;</div>
</div>

<?php get_footer(); ?>